I have a shapefile that I changed the projection and coordinate system so it would match some other data. Following these changes I added the layer to ArcMap (v9), and although the layer shows up under the data layer column, nothing can be found in the map area. I "zoomed to layer", selected the "full extent" and still see nothing. In data properties, things look right, so I am bewildered why I can't see the layer. Any thoughts?